This problem first started a couple weeks ago when I go on the highway(over 55mph) my car shakes vigorously for a couple mins then all of a sudden goes away even after the car is warned up and I've been driving for 10+ min. Does an one have anyone idea what the culprit could be?????

 

check tire pressure on all 4 wheels.

 

wheels out of balance?

 

Lose or missing lugs nuts?

 

All lug nuts are in and tight and the wheels are def balanced. As soon as I go on the highway it starts but then after a couple miles it goes away I can't see balance as an issue if it goes away as fast as it starts

 

does it effect your powerband at all or does it feel more suspension related?

 

and what about pressure ...

 

All air pressures are at 32 I have 19s one it and I have never had a problem in the last 2 years they have been on the car. It feels more suspension the first time it happened I thought a tire was going to fall off or I had a flat but all of a sudden it went away. It almost feels like I'm on the rumble strip on the edge of the roads. I can't imagine it being flat spots because after sitting all winter after I took it out two months ago it was perfect.

 

I would think it could be soemething more dangerous like wheel bearings or something to do with the driveline or transmission.

Is it repeatable or random? Are there any noises associated. With it?

 

Only happens when I first hit 55+ after it stops it doesn't come back

 

I would look to front wheel bearings, front ball joints, bent wheel or parts in the steering system (like tie rod ends) to be a problem.

In the Jeep and 4X4 world it's called (over dramatically) "Death Wobble".

 

I had problem like this and could not track it down till it got worse. It was a rear wheel bearing.

 

Was the wheel bearing physically loose?

 

I'm stumped because it goes away

 

No it was a bearing going bad so it was intermittent. You need to jack the car up and pull on each wheel and feel for some play to find it. However, mine was a trick to find. The dealer replaced the wrong wheel bearing when they did it.

 

What it sounds like to me is a brake rotor with excessive run out.
After driving a short distance the brake pad compresses the caliper piston
back into the caliper housing and the brake pad(s) are no longer grabbing
the rotor(s)

Easy test is to slightly depress brake pedal and see if a vibration is
introduced. Is there a brake vibration?

--

 

I think there is an issue with the clutch. When I'm in 4th it feels bogged down but in third it revs to high when I'm doing 35-40. I also didn't feel the shake at 55-60

 

Revs high in third at 40? Yeah that sounds wrong. You should only be at 4k rpms at 40 mph in third.

 

It feels like 4th is too low and 3rd is too high after I drive for 15+mins

 

Well to figure out your speeds, in third you multiply the rpms by 10. So 3k rpm is 30 and 7k is 70mph

In fourth you multiply the rpms by 14 at 3k your speed is 42 or so.